package com.googlecode.veloeclipse.scanner;

import org.eclipse.jface.text.rules.ICharacterScanner;
import org.eclipse.jface.text.rules.IToken;
import org.eclipse.jface.text.rules.MultiLineRule;

/**
 * DOCUMENT ME!
 * 
 * @version $Revision: 7 $
 * @author <a href="mailto:akmal.sarhan@gmail.com">Akmal Sarhan </a>
 */
public class TagRule extends MultiLineRule
{

    public TagRule(IToken token)
    {
        super("<", ">", token); //$NON-NLS-1$ //$NON-NLS-2$
    }

    protected boolean sequenceDetected(ICharacterScanner scanner, char[] sequence, boolean eofAllowed)
    {
        int c = scanner.read();
        if (sequence[0] == '<')
        {
            if (c == '?')
            {
                // processing instruction - abort
                scanner.unread();
                return false;
            }
            if (c == '!')
            {
                scanner.unread();
                // comment - abort
                return false;
            }
        } else if (sequence[0] == '>')
        {
            scanner.unread();
        }
        return super.sequenceDetected(scanner, sequence, eofAllowed);
    }
}
